* Add systemd service file
* Add DEB and RPM packages for amd64, amd64v3 and arm64 architectures
* Remove GOMEMLIMIT from systemd service
* Fix packaged systemd service defaults
UPX --best/--lzma/--brute adds ~3s startup time on low-spec systems
(linux/arm) due to in-memory decompression on every invocation of gost -V.
Disabled by default; opt in via GORELEASER_UPX=true for release builds
that need it.